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United States Patent | 5,509,673 |
Wu ,   et al. | April 23, 1996 |
An armrest-driven wheelchair in which the armrests are pivoted to the wheelchair frame and turned turned back and forth about a respective pivot to rotate the wheels forwards or backwards by a respective transmission rod, which is driven by the respective armrest to connect a first bearing means, which is driven to turn the respective wheel forwards, or a second bearing means, which is driven to turn the respective wheel backwards, to the respective armrest.
Inventors: | Wu; Kung-Hsiung (No. 294, Sec. 3, Hsing-Lung Rd., Taipei, TW); Hsu; Hsiu-Fong (No. 294, Sec. 3, Hsing-Lung Rd., Taipei, TW) |
Appl. No.: | 382168 |
Filed: | February 1, 1995 |
Current U.S. Class: | 280/250.1; 280/253; 280/255; D12/131 |
Intern'l Class: | A61G 005/02; B62M 001/04; B62M 001/14; B62M 001/16 |
Field of Search: | 280/250.1,236,237,238,253,255,304.1 |
4453729 | Jun., 1984 | Lucken | 280/250. |
4762332 | Aug., 1988 | Seol | 280/250. |
5303945 | Apr., 1994 | Oxford | 280/253. |